Rydberg : Rocky Mountain flora 71 



includes P. anisatiis and P. bipinnatus in his section Oreoxis, but the 

 genus Oreoxis has all ribs corky and the lateral ones scarcely more 

 prominent than the dorsal ones, the fruit is not flattened dorsally, 

 the styles and sepals are erect. In Pseudocymopterus anisatiis 

 the lateral wings are very prominent, the dorsal ribs narrowly 

 winged or some of them merely acute, the styles are recurved, 

 the sepals spreading and one or two of them larger than the rest, 

 and the fruit is decidedly flattened dorsally. The plant is more 

 related to Aletes than to Oreoxis, and P. aletifolius connects it with 

 that genus. It can not be placed in Aletes, however, for in that 

 genus the fruit is not compressed and the ribs not winged. It 

 would be much better to include P. anisatus and P. aletifolius in 

 Pteryxia, as they have the foliage and nearly the same fruit as in 

 that genus, but the strictly acaulescent plant, the narrow and thick 

 wings of the fruit and the very prominent and unequal calyx-teeth 

 would make it rather abnormal even in that genus. Although 

 It does not differ so much in the technical characters of the 

 fruit from the typical Pseudocymopterus, the habit is quite diff'erent, 

 so also the texture of the leaves, and in Pseudocymopterus the 

 sepals are minute. It is better to regard P. anisatus as a type of 

 a new genus. 



Pseudopteryxia Rydb. gen. nov. 



Densely cespitose, strong-scented, acaulescent perennials with 

 multicipital caudices covered with numerous sheaths of old lea\'es. 

 Leaves pinnatifid or bipinnatifid with thick, firm, pungent divi- 

 sions. Flowers yellow; involucres \vanting; bractlets linear-subu- 

 late, pungent. Calyx-teeth very prominent, spreading, unequal, 

 one or two much longer than the rest. Stylopodium wanting. 

 Fruit oblong, glabrous. Ribs thick, the dorsal and intermediate 

 ones sharp or some of them with narrow wings; the lateral ones 

 with broader wings, distinct from those of the other carpel. 

 Carpels flattened dorsally. Oil tubes 1-3 in the intervals, 2-4 

 on the commissural side. Seed face plane. 



Pseudopter3rxia anisata (A. Gray) Rydb. 

 Cymopterus (?) anisatus A. Gray, Proc. Acad. Phila. 1862: 63. 



1863. 

 Pseudocymopterus anisatus C. & R. Rev. N. Am. Umb. 75. 1888. 



